Home/CVE/A flaw was found in samba. A race condition in the password lockout code may lead to the risk of brute force attacks bei
CVE

CVE-2021-20251

A flaw was found in samba. A race condition in the password lockout code may lead to the risk of brute force attacks bei

A flaw was found in samba. A race condition in the password lockout code may lead to the risk of brute force attacks being successful if special conditions are met.

MEDIUM · CVSS 5.9 EPSS 0.00222
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
▤

Affected Products & Versions

3
samba>= 4.1.0 and < 4.16.8
samba>= 4.17.0 and < 4.17.4
fedoraproject fedoraall versions
⚠

Public Exploits & PoCs

1
pocbugzilla.samba.org · show_bug.cgi?id=14611bugzilla.samba.org
▣

Scoring & Timeline

5.9
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD06 Mar 2023 · 11:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

11
msrcCVE-2021-20251
suse-csafopenSUSE-SU-2024:12435-1
suse-csafSUSE-SU-2023:0620-1
suse-csafSUSE-SU-2023:0222-1
suse-csafSUSE-SU-2023:0160-1
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.redhat.com/show_bug.cgi?id=1929800Issue TrackingThird Party Advisory
https://security.gentoo.org/glsa/202309-06
https://security.netapp.com/advisory/ntap-20230331-0005/Third Party Advisory
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